Two men were attempting to cross the road near Lakeview Harbor when they struck, the release stated.
Jeffrey S. Gates, 48, of Port Jefferson was dead at the scene and Virgil S. Gates, 24, also of Port Jefferson, is critical at Grant Medical Center where he was taken by Careflight.
The driver of an older model blue four door vehicle fled southbound on Ohio 235.
The vehicle is reported to be a late-80s to mid-90s General Motors vehicle, possible a Chevrolet Celebrity or Buick with dark blue patches of touch up paint on the bottom of both passenger-side doors.
Authorities believe its front end was damaged in the accident.
Witnesses or those with information regarding the vehicle involved should contact the Ohio State Highway Patrol at 937-593-2075.